What Is the Minimum Frequency of a Photon That Can $\varPhi$

Multiple Choice

What is the minimum frequency of a photon that can eject a photoelectron from Ba metal? (The work function of barium is $\varPhi$ = 4.3 *10^-19 J.)

A) 2.8* 10^-52 Hz
B) 6.5 *10¹⁴ Hz
C) 6.5 * 10⁴ Hz
D) 6.5*10¹³ Hz
E) 2.8 * 10¹⁴ Hz